[PATCH V3 3/6] MTD : add the database for the NANDs
Florian Fainelli
ffainelli at freebox.fr
Wed Mar 30 04:46:04 EDT 2011
Hello Huang,
On Wednesday 30 March 2011 10:40:10 Huang Shijie wrote:
> This is a new database for the NANDs which is searched by the id_bytes.
drivers/mtd//nand/nand_base.c will be able to detect all of your chips listed
below based on the ids present in drivers/mtd/nand/nand_ids.c
If you have new chips to support in the future, you should add them in
drivers/mtd/nand/nand_ids.c and not keep this file.
I still do not understand why this would be needed, is it because the generic
code does not provide enough informations for your driver?
>
> Signed-off-by: Huang Shijie <b32955 at freescale.com>
> ---
> drivers/mtd/nand/nand_device_info.c | 157
> +++++++++++++++++++++++++++++++++++ drivers/mtd/nand/nand_device_info.h |
> 88 +++++++++++++++++++
> 2 files changed, 245 insertions(+), 0 deletions(-)
> create mode 100644 drivers/mtd/nand/nand_device_info.c
> create mode 100644 drivers/mtd/nand/nand_device_info.h
>
> diff --git a/drivers/mtd/nand/nand_device_info.c
> b/drivers/mtd/nand/nand_device_info.c new file mode 100644
> index 0000000..757ed89
> --- /dev/null
> +++ b/drivers/mtd/nand/nand_device_info.c
> @@ -0,0 +1,157 @@
> +/*
> + * Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved.
> + */
> +
> +/*
> + * The code contained herein is licensed under the GNU General Public
> + * License. You may obtain a copy of the GNU General Public License
> + * Version 2 or later at the following locations:
> + *
> + * http://www.opensource.org/licenses/gpl-license.html
> + * http://www.gnu.org/copyleft/gpl.html
> + */
> +#include <asm/sizes.h>
> +#include <linux/mtd/nand.h>
> +
> +#include "nand_device_info.h"
> +
> +static const struct nand_device_info samsung_nand[] = {
> + {
> + .id = { 0xec, 0xd3, 0x14, 0x25, 0x64, 0xec, 0xd3, 0x14 },
> + .id_len = 8,
> + .desc = "K9G8G08U0M, K9HAG08U1M",
> + .attr = ATTR(MLC, NAND_BUSWIDTH_8, 1LL * SZ_1G, 128,
> + 2 * SZ_1K + 64, 8, 512),
> + }, {
> + .id = { 0xec, 0xd7, 0xd5, 0x29, 0x38, 0x41, 0xec, 0xd7 },
> + .id_len = 8,
> + .desc = "K9LBG08U0D",
> + .attr = ATTR(MLC, NAND_BUSWIDTH_8, 4LL * SZ_1G, 128,
> + 4 * SZ_1K + 218, 16, 512),
> + }, {
> + .id = { 0xec, 0xd5, 0x14, 0xb6, 0x74, 0xec, 0xd5, 0x14 },
> + .id_len = 8,
> + .desc = "K9GAG08U0M",
> + .attr = ATTR(MLC, NAND_BUSWIDTH_8, 2LL * SZ_1G, 128,
> + 4 * SZ_1K + 218, 16, 512),
> + }, {
> + /* end of the table. */
> + .id = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
> + },
> +};
> +
> +/* macro to get the id bytes */
> +#define ID_GET_MFR_CODE(id) ((id)[0])
> +
> +void nand_device_print_info(struct nand_device_info *info)
> +{
> + unsigned i;
> + const char *mfr_name;
> + const char *cell_technology_name;
> + uint64_t chip_size;
> + const char *chip_size_units;
> + unsigned page_size;
> + unsigned oob_size;
> + struct nand_attr *attr = &info->attr;
> +
> + /* Prepare the manufacturer name. */
> + mfr_name = "Unknown";
> + for (i = 0; nand_manuf_ids[i].id; i++) {
> + if (nand_manuf_ids[i].id == ID_GET_MFR_CODE(info->id)) {
> + mfr_name = nand_manuf_ids[i].name;
> + break;
> + }
> + }
> +
> + /* Prepare the name of the cell technology. */
> + switch (attr->cell_technology) {
> + case SLC:
> + cell_technology_name = "SLC";
> + break;
> + case MLC:
> + cell_technology_name = "MLC";
> + break;
> + default:
> + cell_technology_name = "Unknown";
> + break;
> + }
> +
> + /* Prepare the chip size. */
> + if ((attr->chip_size_in_bytes >= SZ_1G) &&
> + !(attr->chip_size_in_bytes % SZ_1G)) {
> + chip_size = attr->chip_size_in_bytes / ((uint64_t) SZ_1G);
> + chip_size_units = "GiB";
> + } else if ((attr->chip_size_in_bytes >= SZ_1M) &&
> + !(attr->chip_size_in_bytes % SZ_1M)) {
> + chip_size = attr->chip_size_in_bytes / ((uint64_t) SZ_1M);
> + chip_size_units = "MiB";
> + } else {
> + chip_size = attr->chip_size_in_bytes;
> + chip_size_units = "B";
> + }
> +
> + /* Prepare the page geometry. */
> + page_size = (1 << (fls(attr->page_total_size_in_bytes) - 1));
> + oob_size = attr->page_total_size_in_bytes - page_size;
> +
> + /* Print the infomation. */
> + pr_info("--------------------------------------\n");
> + pr_info(" NAND device infomation (RAW)\n");
> + pr_info("--------------------------------------\n");
> + pr_info("Manufacturer : %s (0x%02x)\n", mfr_name, info->id[0]);
> + pr_info("Device Code : 0x%02x\n", info->id[1]);
> + pr_info("Cell Technology : %s\n", cell_technology_name);
> + pr_info("Chip Size : %llu %s\n", chip_size, chip_size_units);
> + pr_info("Pages per Block : %u\n", attr->block_size_in_pages);
> + pr_info("Page Geometry : %u+%u\n", page_size, oob_size);
> + pr_info("ECC Strength : %u bits\n", attr->ecc_strength_in_bits);
> + pr_info("ECC Size : %u B\n", attr->ecc_size_in_bytes);
> + pr_info("Description : %s\n", info->desc);
> +}
> +
> +static struct nand_device_info * __init
> +search_table(const struct nand_device_info *table, const uint8_t id[])
> +{
> + struct nand_device_info *info = (struct nand_device_info *)table;
> +
> + while (ID_GET_MFR_CODE(info->id)) {
> + int i;
> +
> + /* match all the valid id bytes. Is it too strict? */
> + for (i = 0; i < info->id_len; i++)
> + if (info->id[i] != id[i])
> + break;
> +
> + /* found it */
> + if (i == info->id_len)
> + return info;
> + info++;
> + }
> + return NULL;
> +}
> +
> +struct nand_device_mfr_info {
> + uint8_t id;
> + const struct nand_device_info *table;
> +};
> +
> +static const struct nand_device_mfr_info nand_device_mfr_directory[] = {
> + { NAND_MFR_SAMSUNG, samsung_nand },
> + { 0, NULL },
> +};
> +
> +struct nand_device_info *nand_device_get_info(const uint8_t id[])
> +{
> + uint8_t mfr_id = ID_GET_MFR_CODE(id);
> + unsigned i;
> +
> + for (i = 0; nand_device_mfr_directory[i].id; i++) {
> + if (nand_device_mfr_directory[i].id == mfr_id) {
> + const struct nand_device_info *table;
> +
> + table = nand_device_mfr_directory[i].table;
> + return search_table(table, id);
> + }
> + }
> + return NULL;
> +}
> diff --git a/drivers/mtd/nand/nand_device_info.h
> b/drivers/mtd/nand/nand_device_info.h new file mode 100644
> index 0000000..15f688d
> --- /dev/null
> +++ b/drivers/mtd/nand/nand_device_info.h
> @@ -0,0 +1,88 @@
> +/*
> + * Copyright 2011 Freescale Semiconductor, Inc. All Rights Reserved.
> + */
> +
> +/*
> + * The code contained herein is licensed under the GNU General Public
> + * License. You may obtain a copy of the GNU General Public License
> + * Version 2 or later at the following locations:
> + *
> + * http://www.opensource.org/licenses/gpl-license.html
> + * http://www.gnu.org/copyleft/gpl.html
> + */
> +#ifndef __DRIVERS_NAND_DEVICE_INFO_H
> +#define __DRIVERS_NAND_DEVICE_INFO_H
> +
> +enum nand_device_cell_technology {
> + SLC = 0,
> + MLC = 1,
> +};
> +
> +/**
> + * @cell_technology: The storage cell technology.
> + * @busw: The bus width of the NAND.
> + * @chip_size_in_bytes: The total size of the storage behind a single
> + * chip select, in bytes. Notice that this is *not*
> + * necessarily the total size of the storage in a
> + * *package*, which may contain several chips.
> + * @block_size_in_pages: The number of pages in a block.
> + * @page_total_size_in_bytes: The total size of a page, in bytes,
> including + * both the data and the OOB.
> + * @ecc_strength_in_bits: The strength of the ECC called for by the
> + * manufacturer, in number of correctable bits.
> + * @ecc_size_in_bytes: The size of the data block over which the
> + * manufacturer calls for the given ECC algorithm
> + * and strength.
> + */
> +struct nand_attr {
> + /* Technology */
> + enum nand_device_cell_technology cell_technology;
> +
> + /* bus width */
> +#define NAND_BUSWIDTH_8 0
> + uint32_t busw;
> +
> + /* Geometry */
> + uint64_t chip_size_in_bytes;
> + uint32_t block_size_in_pages;
> + uint32_t page_total_size_in_bytes;
> +
> + /* ECC */
> + uint16_t ecc_strength_in_bits;
> + uint16_t ecc_size_in_bytes;
> +};
> +
> +#define ID_BYTES (8)
> +/*
> + * struct nand_device_info - Information about a single NAND Flash device.
> + *
> + * This structure contains all the *essential* information about a NAND
> Flash + * device, derived from the device's data sheet.
> + */
> +struct nand_device_info {
> + /* id */
> + uint8_t id[ID_BYTES];
> + unsigned int id_len;
> +
> + /* Description */
> + const char *desc;
> +
> + /* attribute*/
> + struct nand_attr attr;
> +};
> +
> +/* macro for the NAND attribute */
> +#define ATTR(_a, _b, _c, _d, _e, _f, _g) \
> + { \
> + .cell_technology = (_a), \
> + .busw = (_b), \
> + .chip_size_in_bytes = (_c), \
> + .block_size_in_pages = (_d), \
> + .page_total_size_in_bytes = (_e), \
> + .ecc_strength_in_bits = (_f), \
> + .ecc_size_in_bytes = (_g), \
> + }
> +
> +struct nand_device_info *nand_device_get_info(const uint8_t id_bytes[]);
> +void nand_device_print_info(struct nand_device_info *info);
> +#endif
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